It's a nice simple little game. I enjoyed it for a few minutes.
Suggestions:
Adding a "phase" track that shows when you/opponent plays character/support would be helpful, especially as there are cards that trigger on specific phases.
Some symbols on the cards do not scale well, and look very different when the cards are enlarged/small. Consider symbols with less detail, or alternate simplified versions for when the card is shrunk.
The color of the character cards are the most readable part, but AFAIK don't affect game play. While matching lore is cool, consider using color to help the symbols be more readable.